find the perimeter of a rectangle if: L=12 cm, W=5 cm
P = 2L + 2W
P = 2(12) + 2(5)
P = 24 + 10
P = ______ cm
34
Right.
To find the perimeter of a rectangle, you need to add up the lengths of all four sides. In this case, we are given the length (L) as 12 cm and the width (W) as 5 cm.
A rectangle has two pairs of equal sides - the length and the width. Therefore, the perimeter can be calculated by adding the lengths of the four sides: 2 * (L + W).
Substituting the values, we get:
Perimeter = 2 * (L + W)
= 2 * (12 cm + 5 cm)
= 2 * 17 cm
= 34 cm
Hence, the perimeter of the given rectangle is 34 cm.